Co-rotating scroll compressor and method of assembling the same

ABSTRACT

A scroll accommodation portion (3b) for accommodating a driving-side scroll member (70), a driven-side scroll member (90), a first support member (33), and a second support member (35) is provided. The first driving-side scroll portion (71) and a second driving-side scroll portion (72) are fixed by a wall fixing bolt (31). The driven-side scroll member (90) and the second support member (35) are fixed by a second support fixing bolt (36). The scroll accommodation portion (3b) is formed with an access hole (3b1) accessible to the wall fixing bolt (31) and the second support fixing bolt (36).

TECHNICAL FIELD

The present disclosure relates to a co-rotating scroll compressor and amethod of assembling the same.

BACKGROUND ART

A co-rotating scroll compressor has been known (see PTL 1). Theco-rotating scroll compressor includes a driving-side scroll and adriven-side scroll that rotates in synchronization with the driving-sidescroll, and causes a drive shaft causing the driving-side scroll torotate and a driven-shaft supporting rotation of the driven-side scrollto rotate in the same direction at the same angular velocity while thedriven-shaft is offset by a revolving radius from the drive shaft.

CITATION LIST Patent Literature

[PTL 1] the Publication of Japanese Patent No. 5443132

SUMMARY OF INVENTION Technical Problem

In the co-rotating type scroll compressor, each rotation arounddifferent rotation axes of the driving-side scroll member and thedriven-side scroll member makes it difficult to assemble the two scrollmembers into the housing.

The present disclosure is made in consideration of such circumstances,and an object of the present disclosure is to provide a co-rotatingscroll compressor that facilitates assembly work and an assembly methodthereof.

Solution to Problem

To solve the above-described issues, a co-rotating scroll compressor andan assembly method thereof according to the present disclosure adopt thefollowing solutions.

A co-rotating scroll compressor according to an aspect of the presentdisclosure includes: a driving-side scroll member that is rotationallydriven by a driving unit and includes a spiral driving-side walldisposed on a driving-side end plate; a driven-side scroll member thatincludes a driven-side wall corresponding to the driving-side wall, thedriven-side wall being disposed on a driven-side end plate and engagingwith the driving-side wall to form a compression space; a synchronousdriving mechanism that transmits driving force from the driving-sidescroll member to the driven-side scroll member to cause the driving-sidescroll member and the driven-side scroll member to perform rotationalmovement in a same direction at a same angular velocity; and a housingaccommodating the driving-side scroll member, the driven-side scrollmember and the synchronous driving mechanism, in which the driving-sidescroll member includes a first driving-side scroll portion, a seconddriving-side scroll portion, and a wall fixing part, the firstdriving-side scroll portion including a first driving-side end plate anda first driving-side wall and being driven by the driving unit, thesecond driving-side scroll portion including a second driving-side endplate and a second driving-side wall, and the wall fixing partperforming fixing while a front end in an axial direction of the firstdriving-side wall and a front end in an axial direction of the seconddriving-side wall face each other, and the driven-side scroll memberincludes a first driven-side wall and a second driven-side wall, thefirst driven-side wall being provided on one side surface of thedriven-side end plate and engaging with the first driving-side wall, andthe second driven-side wall being provided on another side surface ofthe driven-side end plate and engaging with the second driving-sidewall, in which the co-rotating scroll compressor includes a firstsupport member and a second support member, the first support memberbeing disposed with the first driving-side end plate interposedtherebetween and being fixed by a first support fixing part to the frontend side in the axial direction of the first driven-side wall to rotatewith the first driven-side wall, and the second support member beingdisposed with the second driving-side end plate interposed therebetweenand being fixed by a second support fixing part to the front end side inthe axial direction of the second-driven side wall to rotate with thesecond driven-side wall, in which a hole accessible to the wall fixingpart and/or the first support fixing part and/or the second supportfixing part is formed in the housing.

The driving-side wall disposed on the end plate of the driving-sidescroll member is engaged with the corresponding driven-side wall of thedriven-side scroll member. The driving-side scroll member isrotationally driven by the driving unit, and the driving forcetransmitted to the driving-side scroll member is transmitted to thedriven-side scroll member through the synchronous driving mechanism. Asa result, the driven-side scroll member rotates as well as performsrotational movement in the same direction at the same angular velocitywith respect to the driving-side scroll member. As described above, theco-rotating scroll compressor in which both of the driving-side scrollmember and the driven-side scroll member rotate is provided.

The housing is provided with a hole accessible to the wall fixing partand/or the first support fixing part and/or the second support fixingpart. A tool can be inserted through this hole to access the wall fixingpart and/or the first support fixing part and/or the second supportfixing part. As a result, after the driving-side scroll member and thesupport member are incorporated into the housing, access can beperformed from the outside of the housing, and work can be performed,which facilitates assembly work.

The hole may also be used for access to the reference pin or positioningpin of each component incorporated in the housing, or for passing astopper to prevent rotation of the scroll member during assembly, asanother application.

Further, the co-rotating scroll compressor according to one aspect ofthe present disclosure includes a sealing body that seals the hole.

The sealing body is attached to the hole and sealed after the work isperformed using the hole. Therefore, the housing can be closely sealed.

Further, in the co-rotating scroll compressor according to one aspect ofthe present disclosure, a plurality of the holes are provided.

Multiple holes are formed. This enables various works to be performed atdesired positions.

Further, in the co-rotating scroll compressor according to one aspect ofthe present disclosure, the hole is provided at end part opposite to theend part that is openable of the housing.

When the end part of the housing is openable, each component may beinserted into the housing from the openable end part during assembly.However, it may be necessary to access each component after eachcomponent is inserted into the housing and assembled in the housing.Therefore, providing a hole at the end part opposite to the openable endpart enables access to each component assembled in the housing.

Further, a method of assembling a co-rotating scroll compressoraccording to an aspect of the present disclosure, the co-rotating scrollcompressor including: a driving-side scroll member that is rotationallydriven by a driving unit and includes a spiral driving-side walldisposed on a driving-side end plate; a driven-side scroll member thatincludes a driven-side wall corresponding to the driving-side wall, thedriven-side wall being disposed on a driven-side end plate and engagingwith the driving-side wall to form a compression space; a synchronousdriving mechanism that transmits driving force from the driving-sidescroll member to the driven-side scroll member to cause the driving-sidescroll member and the driven-side scroll member to perform rotationalmovement in a same direction at a same angular velocity; and a housingaccommodating the driving-side scroll member, the driven-side scrollmember and the synchronous driving mechanism, in which the driving-sidescroll member includes a first driving-side scroll portion, a seconddriving-side scroll portion, and a wall fixing part, the firstdriving-side scroll portion including a first driving-side end plate anda first driving-side wall and being driven by the driving unit, thesecond driving-side scroll portion including a second driving-side endplate and a second driving-side wall, and the wall fixing partperforming fixing while a front end in an axial direction of the firstdriving-side wall and a front end in an axial direction of the seconddriving-side wall face each other, and the driven-side scroll memberincludes a first driven-side wall and a second driven-side wall, thefirst driven-side wall being provided on one side surface of thedriven-side end plate and engaging with the first driving-side wall, andthe second driven-side wall being provided on another side surface ofthe driven-side end plate and engaging with the second driving-sidewall, in which the co-rotating scroll compressor includes a firstsupport member and a second support member, the first support memberbeing disposed with the first driving-side end plate interposedtherebetween and being fixed by a first support fixing part to the frontend side in the axial direction of the first driven-side wall to rotatewith the first driven-side wall, and the second support member beingdisposed with the second driving-side end plate interposed therebetweenand being fixed by a second support fixing part to the front end side inthe axial direction of the second-driven side wall to rotate with thesecond driven-side wall, in which the first support fixing part or thesecond support fixing part is fixed, after the first support member orthe second support member is assembled to the housing, using a holeaccessible to the first support fixing part or the second support fixingpart formed in the housing.

The housing is formed with the hole that allows access to the firstsupport fixing part or the second support fixing part. A tool can beinserted through the hole accessible to the first support fixing part orthe second support fixing part. Thus, after the support member isincorporated into the housing, access can be performed from the outsideof the housing, and the complexity of the assembly process can bereduced.

Further, a method of assembling a co-rotating scroll compressoraccording to an aspect of the present disclosure, the co-rotating scrollcompressor including: a driving-side scroll member that is rotationallydriven by a driving unit and includes a spiral driving-side walldisposed on a driving-side end plate; a driven-side scroll member thatincludes a driven-side wall corresponding to the driving-side wall, thedriven-side wall being disposed on a driven-side end plate and engagingwith the driving-side wall to form a compression space; a synchronousdriving mechanism that transmits driving force from the driving-sidescroll member to the driven-side scroll member to cause the driving-sidescroll member and the driven-side scroll member to perform rotationalmovement in a same direction at a same angular velocity; and a housingaccommodating the driving-side scroll member, the driven-side scrollmember and the synchronous driving mechanism, in which the driving-sidescroll member includes a first driving-side scroll portion, a seconddriving-side scroll portion, and a wall fixing part, the firstdriving-side scroll portion including a first driving-side end plate anda first driving-side wall and being driven by the driving unit, thesecond driving-side scroll portion including a second driving-side endplate and a second driving-side wall, and the wall fixing partperforming fixing while a front end in an axial direction of the firstdriving-side wall and a front end in an axial direction of the seconddriving-side wall face each other, and the driven-side scroll memberincludes a first driven-side wall and a second driven-side wall, thefirst driven-side wall being provided on one side surface of thedriven-side end plate and engaging with the first driving-side wall, andthe second driven-side wall being provided on another side surface ofthe driven-side end plate and engaging with the second driving-sidewall, in which the co-rotating scroll compressor includes a firstsupport member and a second support member, the first support memberbeing disposed with the first driving-side end plate interposedtherebetween and being fixed by a first support fixing part to the frontend side in the axial direction of the first driven-side wall body torotate with the first driven-side wall, and the second support memberbeing disposed with the second driving-side end plate interposedtherebetween and being fixed by a second support fixing part to thefront end side in the axial direction of the second-driven side wall torotate with the second driven-side wall, in which the wall fixing partis fixed, after the first driving-side scroll portion or the seconddriving-side scroll portion are assembled to the housing, using a holeaccessible to the wall fixing part formed in the housing.

The housing is formed with the hole accessible to the wall fixing part.A tool can be inserted through this hole to access to the wall fixingpart. As a result, after the driving-side scroll member is incorporatedinto the housing, access can be performed from the outside of thehousing, and the complexity of the assembly process can be reduced.

In addition, an assembling method of the co-rotating scroll compressoras a reference example, the co-rotating scroll compressor including: adriving-side scroll member that is rotationally driven by a driving unitand includes a spiral driving-side wall disposed on a driving-side endplate; a driven-side scroll member that includes a driven-side wallcorresponding to the driving-side wall, the driven-side wall beingdisposed on a driven-side end plate and engaging with the driving-sidewall to form a compression space; a synchronous driving mechanism thattransmits driving force from the driving-side scroll member to thedriven-side scroll member to cause the driving-side scroll member andthe driven-side scroll member to perform rotational movement in a samedirection at a same angular velocity; and a housing accommodating thedriving-side scroll member, the driven-side scroll member and thesynchronous driving mechanism, in which the driving-side scroll memberincludes a first driving-side scroll portion, a second driving-sidescroll portion, and a wall fixing part, the first driving-side scrollportion including a first driving-side end plate and a firstdriving-side wall and being driven by the driving unit, the seconddriving-side scroll portion including a second driving-side end plateand a second driving-side wall, and the wall fixing part performingfixing while a front end in an axial direction of the first driving-sidewall and a front end in an axial direction of the second driving-sidewall face each other, and the driven-side scroll member includes a firstdriven-side wall and a second driven-side wall, the first driven-sidewall being provided on one side surface of the driven-side end plate andengaging with the first driving-side wall, and the second driven-sidewall being provided on another side surface of the driven-side end plateand engaging with the second driving-side wall, in which the co-rotatingscroll compressor includes a first support member and a second supportmember, the first support member being disposed with the firstdriving-side end plate interposed therebetween and being fixed by afirst support fixing part to the front end side in the axial directionof the first driven-side wall to rotate with the first driven-side wall,and the second support member being disposed with the seconddriving-side end plate interposed therebetween and being fixed by asecond support fixing part to the front end side in the axial directionof the second-driven side wall to rotate with the second driven-sidewall, in which after the first driving-side scroll portion and thesecond driving-side scroll portion, the first support member and thesecond support member are integrated to form an assembly, the assemblyis assembled to the housing.

Before being inserted into the housing, the first driving-side scrollportion and the second driving-side scroll portion, the first supportmember and the second support member are integrated to form an assembly.Thus, centering of both scroll members can be performed before beingincorporated into the housing, so that both scroll members can beaccurately assembled. In addition, the hole and the sealing bodydescribed above become unnecessary, and the number of parts can bereduced.

Advantageous Effects of Invention

A hole is provided in the housing to allow access to the driving-sidescroll member and the support member. This can facilitate assembly.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a longitudinal sectional view showing a co-rotating scrollcompressor according to an embodiment of the present disclosure.

FIG. 2A is a longitudinal sectional view showing a first process of anassembly of the co-rotating scroll compressor of FIG. 1.

FIG. 2B is a longitudinal sectional view showing a second process of theassembly of the co-rotating scroll compressor of FIG. 1.

FIG. 2C is a longitudinal sectional view showing a third process of theassembly of the co-rotating scroll compressor of FIG. 1.

FIG. 2D is a longitudinal sectional view showing a fourth process of theassembly of the co-rotating scroll compressor of FIG. 1.

FIG. 2E is a longitudinal sectional view showing a fifth process of theassembly of the co-rotating scroll compressor of FIG. 1.

FIG. 3A is a longitudinal cross-sectional view showing a first processof assembly of the co-rotating scroll compressor according to thereference embodiment.

FIG. 3B is a longitudinal cross-sectional view showing a second processof the assembly of the co-rotating scroll compressor according to thereference embodiment.

DESCRIPTION OF EMBODIMENTS

An embodiment of the present disclosure is described below withreference to FIG. 1 and FIG. 2.

FIG. 1 illustrates a co-rotating scroll compressor (scroll compressor)1. The co-rotating scroll compressor 1 can be used as, for example, asupercharger that compresses combustion air (fluid) to be supplied to aninternal combustion engine such as a vehicle engine.

The co-rotating scroll compressor 1 includes a housing 3, a motor(driving unit) 5 accommodated on one end side in the housing 3, and adriving-side scroll member 70 and a driven-side scroll member 90 thatare accommodated on the other end side in the housing 3.

The housing 3 has a substantially cylindrical shape, and includes amotor accommodation portion 3 a that accommodates the motor 5, and ascroll accommodation portion 3 b that accommodates the scroll members 70and 90.

A cooling fin 3 c to cool the motor 5 is provided on an outer peripheryof the motor accommodation portion 3 a. A discharge opening 3 d fromwhich compressed air (working fluid) is discharged is provided at an endpart of the scroll accommodation portion 3 b. Note that, although notillustrated in FIG. 1, the housing 3 includes an air suction openingfrom which air (working fluid) is sucked in. Further, an access hole 3 b1 that is a through hole is formed at an end part of the scrollaccommodation portion 3 b. The plurality of access holes 3 b 1 areprovided, and are formed in accordance with the position of the objectto be accessed. The number of access holes 3 b 1 may be one.

A sealing bolt (sealing body) 40 for sealing is provided in the accesshole 3 b 1. The sealing bolt 40 is attached after the assembly iscompleted. In addition, when it is not necessary to seal the inside ofthe housing 3, the sealing bolt 40 may be omitted. In this case, thethrough hole by the access hole 3 b 1 remains open.

The motor 5 is driven by being supplied with power from an unillustratedpower supply source. Rotation of the motor 5 is controlled by aninstruction from an unillustrated control unit. A stator 5 a of themotor 5 is fixed to an inner periphery of the housing 3. A rotor 5 b ofthe motor 5 rotates around a driving-side rotation axis CL1. A drivingshaft 6 that extends on the driving-side rotation axis CL1 is connectedto the rotor 5 b. The driving shaft 6 is connected to a firstdriving-side shaft portion 7 c of the driving-side scroll member 70.

The driving-side scroll member 70 includes a first driving-side scrollportion 71 on the motor 5 side, and a second driving-side scroll portion72 on the discharge opening 3 d side.

The first driving-side scroll portion 71 includes a first driving-sideend plate 71 a and first driving-side walls 71 b.

The first driving-side end plate 71 a is connected to the firstdriving-side shaft portion 7 c connected to the driving shaft 6, andextends in a direction orthogonal to the driving-side rotation axis CL1.The first driving-side shaft portion 7 c is provided so as to berotatable with respect to the housing 3 through a first driving-sidebearing 11 that is a ball bearing.

The first driving-side end plate 71 a has a substantially disc shape ina planar view. The plurality of first driving-side walls 71 b formed ina spiral shape are provided on the first driving-side end plate 71 a.The first driving-side walls 71 b are disposed at an equal intervalaround the driving-side rotation axis CL1.

The second driving-side scroll portion 72 includes a second driving-sideend plate 72 a and a second driving-side walls 72 b. The plurality ofsecond driving-side walls 72 b each formed in a spiral shape areprovided similarly to the above-described first driving-side walls 71 b.

A second driving-side shaft portion 72 c in a cylindrical shape thatextends in the driving-side rotation axis CL1 is connected to the seconddriving-side end plate 72 a. The second driving-side shaft portion 72 cis provided so as to be rotatable with respect to the housing 3 througha second driving-side bearing 14 that is a ball bearing. The seconddriving-side end plate 72 a includes a discharge port 72 d extendingalong the driving-side rotation axis CL1.

Two seal members 16 are provided on a front end side (left side inFIG. 1) of the second driving-side shaft portion 72 c relative to thesecond driving-side bearing 14, between the second driving-side shaftportion 72 c and the housing 3. The two seal members 16 and the seconddriving-side bearing 14 are disposed to include a predetermined intervalin the driving side rotation axis CL1 direction. For example, alubricant that is a grease as a semi-solid lubricant is sealed betweenthe two seal members 16. Note that only one seal member 16 may beprovided. In this case, the lubricant is sealed between the seal member16 and the second driving-side bearing 14.

The first driving-side scroll portion 71 and the second driving-sidescroll portion 72 are fixed while the front ends (free ends) of thewalls 71 b and 72 b face each other. The first driving-side scrollportion 71 and the second driving-side scroll portion 72 are fixed bywall fixing bolts (wall fixing parts) 31 that are fastened to flangeportions 73 provided at a plurality of positions in the circumferentialdirection. The flange portions 73 are provided so as to protrude outwardin the radial direction. The wall fixing bolt 31 is in a positionaccessible by a tool from the access hole 3 b 1 formed in the scrollaccommodation portion 3 b.

The driven-side scroll member 90 includes a driven-side end plate 90 athat is located at a substantially center in the axial direction(horizontal direction in figure). The through hole 90 h is provided at acenter of the driven-side end plate 90 a, and causes the compressed airto flow toward the discharge port 72 d.

A first driven-side walls 91 b are provided on one side surface of thedriven-side end plate 90 a, and a second driven-side walls 92 b areprovided on the other side surface of the driven-side end plate 90 a.The first driven-side walls 91 b provided on the motor 5 side from thedriven-side end plate 90 a engage with the first driving-side walls 71 bof the first driving-side scroll portion 71. The second driven-sidewalls 92 b provided on the discharge opening 3 d side from thedriven-side end plate 90 a engage with the second driving-side walls 72b of the second driving-side scroll portion 72.

A first support member 33 and a second support member 35 are provided atboth ends of the driven-side scroll member 90 in the axial direction(horizontal direction in the figure). The first support member 33 isdisposed on the motor 5 side, and the second support member 35 isdisposed on the discharge opening 3 d side.

The first support member 33 is fixed to the front ends (free ends) onthe outer peripheral side of the first driven-side walls 91 b by a firstsupport fixing bolt (first support fixing part) 34, and a second supportmember 35 is fixed to the front ends (free ends) on the outer peripheralside of the second driven-side walls 92 b by a second support fixingbolt (second support fixing part) 36. The second support fixing bolt 36is in a position accessible by a tool from the access hole 3 b 1 formedin the scroll housing 3 b.

A shaft portion 33 a is provided on the center axis side of the firstsupport member 33, and the shaft portion 33 a is fixed to the housing 3through a first support member bearing 37. A shaft portion 35 a isprovided on the center axis side of the second support member 35, andthe shaft portion 35 a is fixed to the housing 3 through a secondsupport member bearing 38. As a result, the driven-side scroll member 90rotates around a driven-side center axis CL2 through the support members33 and 35.

A pin-ring mechanism (synchronous driving mechanism) 15 is providedbetween the first support member 33 and the first driving-side end plate71 a. More specifically, a rolling bearing (ring) is provided in thefirst driving-side end plate 71 a, and a pin member 15 b is provided onthe first support member 33. The pin-ring mechanism 15 transmits thedriving force from the driving-side scroll member 70 to the driven-sidescroll member 90, and causes the scroll members 70 and 90 to performrotational movement in the same direction at the same angular velocity.

The co-rotating scroll compressor 1 including the above-describedconfiguration operates in the following manner.

When the driving shaft 6 rotates around the driving-side rotation axisCL1 by the motor 5, the first driving-side shaft portion 7 c connectedto the driving shaft 6 also rotates, and the driving-side scroll member70 accordingly rotates around the driving-side rotation axis CL1. Whenthe driving-side scroll member 70 rotates, the driving force istransmitted from the support members 33 and 35 to the driven-side scrollmember 90 through the pin-ring mechanisms 15, and the driven-side scrollmember 90 rotates around the driven-side rotation axis CL2. At thistime, when the pin members 15 b of the pin-ring mechanisms 15 move whilebeing in contact with the inner periphery surface of the circular hole,the both scroll members 70 and 90 perform rotational movement at thesame angular velocity in the same direction.

When the scroll members 70 and 90 perform oscillating revolvingmovement, the air sucked through the air suction. opening of the housing3 is sucked in from the outer peripheral side of each of the scrollmembers 70 and 90, and is taken into compression chambers formed by thescroll members 70 and 90. Further, compression is separately performedin compression chambers formed by the first driving-side walls 71 b andthe first driven-side walls 91 b and in compression chambers formed bythe second driving-side walls 72 b and the second driven-side walls 92b. A volume of each of the compression chambers is reduced as each ofthe compression chambers moves toward the center, which compresses theair. The air compressed by the first driving-side walls 71 b and thefirst driven-side walls 91 b passes through the through hole 90 hprovided in the driven-side end plate 90 a, and is joined with the aircompressed by the second driving-side walls 72 b and the seconddriven-side walls 92 b. The resultant air passes through the dischargeport 72 d and is discharged to outside from the discharge opening 3 d ofthe housing 3. The discharged compressed air is guided to anunillustrated internal combustion engine, and is used as combustion air.

Assembly Method

Next, referring to FIGS. 2A to 2E, a method of assembling theco-rotating scroll compressor 1 is described.

First, as shown in FIG. 2A, after the second driving-side bearing 14 andthe second support member bearing 38 are attached to the scrollaccommodation portion 3 b, the second support member 35 is inserted fromthe open end side of the scroll accommodation portion 3 b and assembled.Specifically, the shaft portion 35 a of the second support member 35 isinserted into the inner periphery of the inner ring of the secondsupport member bearing 38. At this time, the sealing bolt 40 (seeFIG. 1) is not attached to the access hole 3 b 1 formed in the scrollaccommodation portion 3 b.

Next, as shown in FIG. 2B, the second driving-side scroll portion 72 isassembled. Specifically, the second driving-side shaft portion 72 c ofthe second driving-side scroll portion 72 is inserted into the innerperiphery of the inner ring of the second driving-side bearing 14.

Then, as shown in FIG. 2C, the driven-side scroll member 90 isassembled. Specifically, after the front end of the second driven-sidewall 92 b of the driven-side scroll member 90 and the front end of thesecond support member 35 are butted, the driven-side scroll member 90and the second support member 35 are fixed using the second supportfixing bolt 36. This fixing work is performed by inserting a tool fromthe access hole 3 b 1 and rotating the second support fixing bolt 36about its axis. When the second support fixing bolt 36 is fixed at aplurality of positions, the fixing work may be performed by rotating thedriven-side scroll member 90 and the second support member 35 by apredetermined angle using the same access hole 3 b 1 or the fixing workmay be performed using a plurality of access holes 3 b 1 provided atcorresponding angular positions without the driven-side scroll member 90and the second support member 35 being rotated.

Then, as shown in FIG. 2D, the first driving-side scroll portion 71 isassembled. Specifically, after the first driving-side wall 71 b isbutted to the second driving-side wall 72 b of the second driving-sidescroll portion 72, the first driving-side scroll portion 71 and thesecond driving-side scroll portion 72 are fixed using the wall fixingbolt 31. This fixing work is performed by inserting a tool from theaccess hole 3 b 1 and rotating the wall fixing bolt 31 about its axis.When the wall fixing bolt 31 is fixed at a plurality of positions, thefixing work may be performed by rotating the driving-side scroll member70 by a predetermined angle using the same access hole 3 b 1, or thefixing work may be performed using a plurality of access holes 3 b 1provided at corresponding angular positions without the driving-sidescroll member 70 being rotated.

Then, as shown in FIG. 2E, the first support member 33 is assembled.Specifically, after the front end of the first driven-side wall 91 b ofthe driven-side scroll member 90 and the front end of the first supportmember 33 are abutted, the driven-side scroll member 90 and the firstsupport member 33 are fixed using the first support fixing bolt 34. Thisfixing work is performed by accessing from the open end (right side endpart in the same Figure) side of the scroll accommodation portion 3 b.

Then, the sealing bolt 40 is fixed to the access hole 3 b 1. Thereby,the inside of the housing 3 can be closely sealed.

The fixing work of the second support fixing bolt 36 described withreference to FIG. 2C may be performed after the driven-side scrollmember 90 is temporarily fixed to the second support member 35, and maybe performed after the process of FIG. 2D or FIG. 2E, for example.

Further, the fixing work of the wall fixing bolt 31 described withreference to FIG. 2D may be performed by accessing from the open endside of the scroll accommodation portion 3 b without using the accesshole 3 b 1.

The present embodiment achieves the following action effects.

A tool can be inserted through the access hole 3 b 1 to access thesecond support fixing bolt 36 and the wall fixing bolt 31. As a result,after the second support member 35 and the driving-side scroll member 70are incorporated into the scroll accommodation portion 3 b, access canbe performed from the outside of the housing 3, and work can beperformed, which facilitates assembly work.

After working using the access hole 3 b 1, the sealing bolt 40 isattached to the access hole 3 b 1 and sealed. This allows the housing 3to be closely sealed.

The access hole 3 b 1 is provided at the end part opposite to the endpart openable of the scroll accommodation portion 3 b. Therefore, thesecond support member 35 and the driving-side scroll member 70 can beaccessed after being assembled in the scroll accommodation portion 3 b.

In the embodiment described above, although the co-rotating scrollcompressor is used as the supercharger, the present disclosure is notlimited to this, and it is possible to widely use it as long as itcompresses fluid. It can also be used, for example, as a refrigerantcompressor used in air conditioning machines. Moreover, it is alsopossible to apply the scroll compressor 1 of the invention to the aircontrol apparatus using air force as a brake system for rail vehicles.

Also, the access hole 3 b 1 can also be used for accessing the referencepins and positioning pins of each component incorporated in the scrollaccommodation portion 3 b or passing a stopper to prevent the scrollmembers 70 and 90 from rotating during assembly as another application.

Reference Embodiment

Reference embodiments are shown in FIGS. 3A and 3B.

If the scroll accommodation portion 3 b is not provided with the accesshole 3 b 1 (see FIG. 1), the assembly is performed as follows. That is,as shown in FIG. 3A and FIG. 3B, the first driving-side scroll portion71 and the second driving-side scroll portion 72 are fixed by the wallfixing bolt 31, and the first support member 33 and the driven-sidescroll member 90 are fixed by the first support fixing bolt 34, and, thesecond support member 35 and the driven-side scroll member 90 are fixedby the second support fixing bolt 36, then these are integrated to forma cartridge (assembly). Thereafter, the cartridge is inserted from theopen end side of the scroll accommodation portion 3 b and assembled.

The cartridge is formed before being inserted into the scrollaccommodation portion 3 b, which allows both scroll members 70 and 90 tobe centered before the cartridge is inserted into the scrollaccommodation portion 3 b. Therefore, the both scroll members 70 and 90can be accurately assembled. Further, the access hole 3 b 1 and thesealing bolt 40 described above become unnecessary, and the number ofparts can be reduced.

REFERENCE SIGNS LIST

-   1 Co-rotating scroll compressor (scroll compressor)-   3 Housing-   3 a Motor accommodation portion-   3 b Scroll accommodation portion (housing)-   3 b 1 Access hole-   3 c Cooling fins-   3 d Discharge opening-   5 Motor (driving unit)-   5 a Stator-   5 b Rotor-   6 Driving shaft-   7 c First driving-side shaft portion-   11 First driving-side bearing-   14 Second driving-side bearing-   15 Pin-ring mechanism (synchronous driving mechanism)-   15 b Pin member-   16 Seal member-   31 Wall fixing bolt (wall fixing part)-   33 First support member-   33 a Shaft portion-   34 First support fixing bolt (first support fixing portion)-   35 Second support member-   35 a Shaft portion-   36 Second support fixing bolt (second support fixing portion)-   37 First support member bearing-   38 Second support member bearing-   40 Sealing bolt (sealed body)-   70 Driving-side scroll member-   71 First driving-side scroll portion-   71 a First driving-side end plate-   71 b First driving-side wall-   72 Second driving-side scroll portion-   72 a Second driving-side end plate-   72 b Second driving-side wall-   72 c Second driving-side shaft portion-   72 d Discharge port-   73 Flange portion-   90 Driven-side scroll member-   90 a Driven-side end plate-   90 h Through hole-   91 b First driven-side wall-   92 b Second driven-side wall-   CL1 Driving-side rotation axis-   CL2 Driven-side rotation axis

1.-7. (canceled)
 8. A co-rotating scroll compressor, comprising: adriving-side scroll member that is rotationally driven by a driving unitand includes a spiral driving-side wall disposed on a driving-side endplate; a driven-side scroll member that includes a driven-side wallcorresponding to the driving-side wall, the driven-side wall beingdisposed on a driven-side end plate and engaging with the driving-sidewall to form a compression space; a synchronous driving mechanism thattransmits driving force from the driving-side scroll member to thedriven-side scroll member to cause the driving-side scroll member andthe driven-side scroll member to perform rotational movement in a samedirection at a same angular velocity; and a housing accommodating thedriving-side scroll member, the driven-side scroll member and thesynchronous driving mechanism, wherein the driving-side scroll memberincludes a first driving-side scroll portion, a second driving-sidescroll portion, and a wall fixing part, the first driving-side scrollportion including a first driving-side end plate and a firstdriving-side wall and being driven by the driving unit, the seconddriving-side scroll portion including a second driving-side end plateand a second driving-side wall, and the wall fixing part performingfixing while a front end in an axial direction of the first driving-sidewall and a front end in an axial direction of the second driving-sidewall face each other, and the driven-side scroll member includes a firstdriven-side wall and a second driven-side wall, the first driven-sidewall being provided on one side surface of the driven-side end plate andengaging with the first driving-side wall, and the second driven-sidewall being provided on another side surface of the driven-side end plateand engaging with the second driving-side wall, wherein the co-rotatingscroll compressor includes a first support member and a second supportmember, the first support member being disposed with the firstdriving-side end plate interposed therebetween and being fixed by afirst support fixing part to the front end side in the axial directionof the first driven-side wall to rotate with the first driven-side wall,and the second support member being disposed with the seconddriving-side end plate interposed therebetween and being fixed by asecond support fixing part to the front end side in the axial directionof the second-driven side wall to rotate with the second driven-sidewall, wherein a hole accessible to the wall fixing part and/or the firstsupport fixing part and/or the second support fixing part is formed inthe housing.
 9. The co-rotating scroll compressor according to claim 8,comprising a sealing body sealing the hole.
 10. The co-rotating scrollcompressor according to claim 8, wherein the co-rotating scrollcompressor is provided with two or more holes.
 11. The co-rotatingscroll compressor according to claim 8, wherein the hole is formed at anend part opposite to an openable end part of the housing.
 12. Theco-rotating scroll compressor according to claim 8, wherein the hole isaccessible to the wall fixing part fixed to a radially outwardlyprojecting flange portion of the first driving-side wall and the seconddriving-side wall and/or the first support fixing part fixed to thefront end on the outer peripheral side of the first driven-side walland/or the second support fixing part fixed to the front end on theouter peripheral side of the second driven-side wall.
 13. A method ofassembling a co-rotating scroll compressor, the co-rotating scrollcompressor comprising: a driving-side scroll member that is rotationallydriven by a driving unit and includes a spiral driving-side walldisposed on a driving-side end plate; a driven-side scroll member thatincludes a driven-side wall corresponding to the driving-side wall, thedriven-side wall being disposed on a driven-side end plate and engagingwith the driving-side wall to form a compression space; a synchronousdriving mechanism that transmits driving force from the driving-sidescroll member to the driven-side scroll member to cause the driving-sidescroll member and the driven-side scroll member to perform rotationalmovement in a same direction at a same angular velocity; and a housingaccommodating the driving-side scroll member, the driven-side scrollmember and the synchronous driving mechanism, wherein the driving-sidescroll member includes a first driving-side scroll portion, a seconddriving-side scroll portion, and a wall fixing part, the firstdriving-side scroll portion including a first driving-side end plate anda first driving-side wall and being driven by the driving unit, thesecond driving-side scroll portion including a second driving-side endplate and a second driving-side wall, and the wall fixing partperforming fixing while a front end in an axial direction of the firstdriving-side wall and a front end in an axial direction of the seconddriving-side wall face each other, and the driven-side scroll memberincludes a first driven-side wall and a second driven-side wall, thefirst driven-side wall being provided on one side surface of thedriven-side end plate and engaging with the first driving-side wall, andthe second driven-side wall being provided on another side surface ofthe driven-side end plate and engaging with the second driving-sidewall, wherein the co-rotating scroll compressor includes a first supportmember and a second support member, the first support member beingdisposed with the first driving-side end plate interposed therebetweenand being fixed by a first support fixing part to the front end side inthe axial direction of the first driven-side wall to rotate with thefirst driven-side wall, and the second support member being disposedwith the second driving-side end plate interposed therebetween and beingfixed by a second support fixing part to the front end side in the axialdirection of the second-driven side wall to rotate with the seconddriven-side wall, wherein the first support fixing part or the secondsupport fixing part is fixed, after the first support member or thesecond support member is assembled to the housing, using a holeaccessible to the first support fixing part or the second support fixingpart formed in the housing.
 14. A method of assembling a co-rotatingscroll compressor, the co-rotating scroll compressor comprising: adriving-side scroll member that is rotationally driven by a driving unitand includes a spiral driving-side wall disposed on a driving-side endplate; a driven-side scroll member that includes a driven-side wallcorresponding to the driving-side wall, the driven-side wall beingdisposed on a driven-side end plate and engaging with the driving-sidewall to form a compression space; a synchronous driving mechanism thattransmits driving force from the driving-side scroll member to thedriven-side scroll member to cause the driving-side scroll member andthe driven-side scroll member to perform rotational movement in a samedirection at a same angular velocity; and a housing accommodating thedriving-side scroll member, the driven-side scroll member and thesynchronous driving mechanism, wherein the driving-side scroll memberincludes a first driving-side scroll portion, a second driving-sidescroll portion, and a wall fixing part, the first driving-side scrollportion including a first driving-side end plate and a firstdriving-side wall and being driven by the driving unit, the seconddriving-side scroll portion including a second driving-side end plateand a second driving-side wall, and the wall fixing part performingfixing while a front end in an axial direction of the first driving-sidewall and a front end in an axial direction of the second driving-sidewall face each other, and the driven-side scroll member includes a firstdriven-side wall and a second driven-side wall, the first driven-sidewall being provided on one side surface of the driven-side end plate andengaging with the first driving-side wall, and the second driven-sidewall being provided on another side surface of the driven-side end plateand engaging with the second driving-side wall, wherein the co-rotatingscroll compressor includes a first support member and a second supportmember, the first support member being disposed with the firstdriving-side end plate interposed therebetween and being fixed by afirst support fixing part to the front end side in the axial directionof the first driven-side wall to rotate with the first driven-side wall,and the second support member being disposed with the seconddriving-side end plate interposed therebetween and being fixed by asecond support fixing part to the front end side in the axial directionof the second-driven side wall to rotate with the second driven-sidewall, wherein the wall fixing part is fixed, after the firstdriving-side scroll portion and the second driving-side scroll portionare assembled to the housing, using a hole accessible to the wall fixingpart formed in the housing.
 15. A method of assembling a co-rotatingscroll compressor, the co-rotating scroll compressor comprising: adriving-side scroll member that is rotationally driven by a driving unitand includes a spiral driving-side wall disposed on a driving-side endplate; a driven-side scroll member that includes a driven-side wallcorresponding to the driving-side wall, the driven-side wall beingdisposed on a driven-side end plate and engaging with the driving-sidewall to form a compression space; a synchronous driving mechanism thattransmits driving force from the driving-side scroll member to thedriven-side scroll member to cause the driving-side scroll member andthe driven-side scroll member to perform rotational movement in a samedirection at a same angular velocity; and a housing accommodating thedriving-side scroll member, the driven-side scroll member and thesynchronous driving mechanism, wherein the driving-side scroll memberincludes a first driving-side scroll portion, a second driving-sidescroll portion, and a wall fixing part, the first driving-side scrollportion including a first driving-side end plate and a firstdriving-side wall and being driven by the driving unit, the seconddriving-side scroll portion including a second driving-side end plateand a second driving-side wall, and the wall fixing part performingfixing while a front end in an axial direction of the first driving-sidewall and a front end in an axial direction of the second driving-sidewall face each other, and the driven-side scroll member includes a firstdriven-side wall and a second driven-side wall, the first driven-sidewall being provided on one side surface of the driven-side end plate andengaging with the first driving-side wall, and the second driven-sidewall being provided on another side surface of the driven-side end plateand engaging with the second driving-side wall, wherein the co-rotatingscroll compressor includes a first support member and a second supportmember, the first support member being disposed with the firstdriving-side end plate interposed therebetween and being fixed by afirst support fixing part to the front end side in the axial directionof the first driven-side wall to rotate with the first driven-side wall,and the second support member being disposed with the seconddriving-side end plate interposed therebetween and being fixed by asecond support fixing part to the front end side in the axial directionof the second-driven side wall to rotate with the second driven-sidewall, wherein after the first driving-side scroll portion and the seconddriving-side scroll portion, the first support member and the secondsupport member are integrated to form an assembly, the assembly isassembled to the housing.